Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7549467 | Wellbore motor having magnetic gear drive | Timothy F. Price, Gareth Hatch | 2009-06-23 |
| 7487829 | Wellbore valve having linear magnetically geared valve actuator | Timothy F. Price | 2009-02-10 |
| 7481283 | Wellbore motor having magnetic gear drive | Timothy F. Price, Gareth Hatch | 2009-01-27 |
| 6530437 | Multi-gradient drilling method and system | William C. Maurer, George H. Medley, Jr. | 2003-03-11 |
| 6457538 | Advanced coring apparatus and method | Gerard T. Pittard, J. Christopher Hetmaniak, Curtis E. Leitko, Jr. | 2002-10-01 |
| 6313755 | Downhole buried utility sensing and data transmission system and method | J. Christopher Hetmaniak, Gerard T. Pittard | 2001-11-06 |
| 5467083 | Wireless downhole electromagnetic data transmission system and method | Gerard T. Pittard, Charles Grissom Steele, Karl F. Kiefer, Terry P. Clifton, Curtis E. Leitko, Jr. | 1995-11-14 |
| 5396966 | Steering sub for flexible drilling | Albert E. Roos, Jr., Steven W. Drews | 1995-03-14 |
| 5277055 | Impact and impact-rotary tool testing apparatus using rotary speed and impact energy | Gerard T. Pittard, Terry P. Clifton, William Christian Herben | 1994-01-11 |
| 5022471 | Deviated wellbore drilling system and apparatus | William C. Maurer | 1991-06-11 |
| 4991668 | Controlled directional drilling system and method | William A. Rehm, William C. Maurer, Curtis E. Leitko, Jr. | 1991-02-12 |
| 4936397 | Earth drilling apparatus with control valve | William C. Maurer | 1990-06-26 |
| 4880065 | Air motor operated rotary earth drilling tool | Michael R. Wasson, Curtis E. Leitko, Jr., Gerard T. Pittard, William C. Maurer | 1989-11-14 |
| 4858704 | Guided earth boring tool | Gerard T. Pittard, William C. Maurer, Michael R. Wasson, William Christian Herben | 1989-08-22 |
| 4828053 | Deviated wellbore drilling system and apparatus | William C. Maurer | 1989-05-09 |
| 4789032 | Orienting and circulating sub | William A. Rehm, William C. Maurer, Curtis E. Leitko, Jr. | 1988-12-06 |
| 4694913 | Guided earth boring tool | Gerard T. Pittard, William C. Maurer, Michael R. Wasson, William Christian Herben | 1987-09-22 |
| 4665997 | Pressure balanced bearing assembly for downhole motors | William C. Maurer | 1987-05-19 |
| 4632191 | Steering system for percussion boring tools | Gerard T. Pittard, William C. Maurer, John H. Cohen, Gregory C. Givler | 1986-12-30 |
| 4621698 | Percussion boring tool | Gerard T. Pittard, William C. Maurer, John H. Cohen, Gregory C. Givler | 1986-11-11 |
| 4496174 | Insulated drill collar gap sub assembly for a toroidal coupled telemetry system | William C. Maurer, David D. Nagel | 1985-01-29 |
| 4387372 | Point gap assembly for a toroidal coupled telemetry system | Harrison C. Smith | 1983-06-07 |
| 4246976 | Down hole drilling motor with pressure balanced bearing seals | — | 1981-01-27 |